[BUG] Displaying bar + line + scatter does not work - strange behaviour connected with global type style

[marcinjahn]

Expected Behavior

I would expect to have a chart with 3 plots:

• green scatter
• blue bar
• red line

Current Behavior

If I set "global" type to 'bar': bar plot is displayed correctly, two other plots are displayed as 'line' ('scatter' setting is ignored');
If I set "global" type to 'line': bar is not displayed at all, two other plots are displayed as 'line' ('scatter' setting is ignored');
If I set "global" type to 'scatter': bar is not displayed at all, two other plots are displayed as 'scatter' ('line' setting is ignored').

Possible Solution

??

Steps to Reproduce (for bugs)

Here's a CodePen example showing the problem:
https://codepen.io/Loreno/pen/bvqxjW

Just change global type setting to : 'bar' or 'line' or 'scatter' to see the behaviors described above.

Context

---

Environment

• Chart.js version: 2.7.2 (Chart.bundle.min.js)
• Browser name and version: Chrome 64
• Link to your project: https://codepen.io/Loreno/pen/bvqxjW

[etimberg]

Covered in #5191